I have to take the mid-term exam, too.

Roundness is my strong point. ...

It's simple,

All you have to do is circle or cross all the equilateral angles.

(Equiangular symbols are the same)

It is easy to find similarities.

If tangency is proved, the tangent point and the center of the circle are connected.

This is also very simple.

But notice another condition.

The length of the connecting line should be equal to the radius.

Because of this, many people were wrong in the mid-term exam last year.

Let's cheer together ...

Have a good exam! !